This is a working overview of research chemical, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-07-09 and is reviewed periodically as new material appears.
BPC-157 is a synthetic peptide composed of fifteen amino acid residues, with the sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. Its name derives from body protection compound, a term used for a protein fraction identified in human gastric juice. Researchers in Zagreb first reported the pentadecapeptide in the early 1990s and described it as a stable fragment of that larger protein. The compound is also catalogued as PL 14736 and, in some commercial contexts, as bepecin. Its molecular formula is C62H98N16O22 and its monoisotopic mass is approximately 1419 daltons.
Most published work on BPC-157 consists of preclinical studies, including rodent models of tissue injury, gastrointestinal lesions, and vascular or tendon damage, together with in vitro cell assays. Reviews frequently note that the mechanisms proposed in these papers remain incompletely characterised and that findings have not been confirmed in large randomised human trials. The compound is widely sold as a research chemical rather than a licensed medicine, and labels commonly carry a statement that it is not for human use. Whether any of the reported animal effects translate to humans is an open question rather than an established result.
Terminology in the literature is not fully standardised. Papers and product listings use BPC-157, BPC 157, and the longer phrase stable gastric pentadecapeptide BPC 157 interchangeably, and synonyms such as bepecin or PL 14736 appear in older or company-linked publications. Purity claims and reported masses can also differ between sources because peptide preparations may include counterions, residual solvents, or bound water. This variability complicates direct comparison of results across studies and makes the exact identity and grade of a given sample worth verifying. Discussions of the compound should therefore specify the source, salt form, and stated purity where those are known.
Early work on this family of molecules examined fractions of human gastric juice, where a larger protein was reported to protect gastrointestinal tissue in animal models. BPC 157 was designed as a shorter, more stable fragment of that protein and then studied on its own. The peptide itself is not a normal dietary component and is not present in the human body in meaningful quantities. Descriptions of its origin therefore refer to the research lineage of a laboratory molecule rather than to an endogenous or nutritional substance.
The sequence contains an unusually high proportion of proline and glycine, which limits regular secondary structure and contributes to solubility in aqueous media. The compound dissolves readily in water and in normal saline. Because it is a peptide, digestive enzymes are expected to break it down if it is swallowed, a consideration that influences the routes of administration used in animal experiments. Detailed conformational data remain limited, and published structural models are largely computational.
BPC 157 is a synthetic peptide built from fifteen amino acids. The letters stand for body protection compound, and the number is a laboratory code rather than a description of any biological feature. Its single-letter sequence is GEPPPGKPADDAGLV, which corresponds to a calculated mass near 1419.5 daltons. The material is produced by solid-phase peptide synthesis and is distributed as a lyophilized powder, not as a purified extract from a natural source.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C62H98N16O22 | Computed for the free peptide |
| Monoisotopic mass | Approximately 1419 Da | Reported values shift with counterion and hydration |
| Residue count | 15 amino acids | Sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val |
| Origin | Fragment of human gastric juice protein | First described in early 1990s research reports |
| Common synonyms | BPC 157; PL 14736; bepecin | Naming varies across papers and catalogues |
Analytical results depend on the column, gradient, and detector wavelength chosen by the laboratory, so purity values from different sources are not always directly comparable. Water content, counterion form, and residual trifluoroacetate affect both mass and purity calculations. Microbiological and endotoxin testing are separate from chemical purity and are not covered by a standard chromatographic run. Buyers evaluating a material typically request the full method description rather than a single purity figure.
Lyophilized peptide powder is generally stored at minus twenty degrees Celsius or lower and kept away from light and moisture. Under these conditions degradation is slow, and sealed vials remain stable for extended periods. Once dissolved, the material is less stable, particularly in aqueous buffers near neutral pH, where hydrolysis and oxidation proceed faster. Solutions are usually kept cold and used within days to weeks. Repeated freeze-thaw cycles are avoided because they encourage aggregation.
Identity and purity are established using reversed-phase high-performance liquid chromatography, which separates the peptide from related impurities and yields a percentage purity. Mass spectrometry, typically with electrospray ionization, confirms the molecular mass against the expected value. Amino acid analysis or peptide mapping provides additional sequence confirmation. These methods are complementary, since chromatography measures how much material is present while mass spectrometry verifies what that material is. A certificate of analysis normally reports both.
Proposed mechanisms in the literature involve the nitric oxide system, vascular endothelial growth factor signaling, and epidermal growth factor receptor pathways. Some studies report changes in blood vessel formation or in inflammatory mediators, while others describe interactions with nervous tissue. Much of this evidence rests on molecular markers in cultured cells or animal models. Whether the same pathways operate the same way in humans has not been established. Authors therefore tend to describe mechanisms as hypothetical rather than settled.
Direct human evidence is scarce. One trial in ulcerative colitis delivered the compound by enema and produced limited publicly reported results without a clear benefit. The compound is not an approved medicine in most jurisdictions. In many markets it is sold as a research chemical; in others it falls under prescription or controlled categories. Regulators have not confirmed any claimed medical use, and product labels rarely undergo premarket review.
The E1 subunit, called the pyruvate dehydrogenase subunit, is either a homodimer (comprising two "α" chains, e.g. in Escherichia coli) or a heterotetramer of two different chains (two "α" and two "β" chains). A magnesium ion forms a 4-coordinate complex with three, polar amino acid residues (Asp, Asn, and Tyr) located on the alpha chain, and the thiamine diphosphate (TPP) cofactor directly involved in decarboxylation of the pyruvate.
== Use in food == Cyanocobalamin is added as an ingredient to fortify nutrition in products such as baby formula, breakfast cereals and energy drinks as well as livestock feed. Endogenous vitamin B12 becomes inactive when exposed to hydrogen cyanide and nitric oxide in cigarette smoke. Vitamin B12 deficiency can develop with heavy regular use of nitrous oxide N2O, also known as "laughing gas", used for anaesthesia in a clinical setting or as a propellant gas, commonly abused as a recreational drug.
=== Effect of parental age and temperature === Offspring produced by older beetles have shorter larval stages than those produced by younger beetles. Larvae from the older beetles also show a rapid weight increase at an earlier age than those from young parents. At 25 °C, the larval stage was shortened, the number of larval molts decreased, and the durations of adult life decreased when parental age increased, compared to the beetles at 30 °C. Another study found that at 20°, 25°, and 30 °C, parental age does not have any effect on the duration of the egg stage, or the weights of the eggs. However, the amount of hatched eggs decreased when parental age increased. When eggs were laid during the first two months after emergence, approximately 90% of the eggs hatched. When they were laid after four months, only about 50% hatched. It was found that larvae from young parents grow at a slower rate, compared to larvae produced by the same parents, nine weeks earlier. At 30 °C, there were no other effects of parental age on the larvae. At 20° and 25 °C, the larvae from young parents required significantly more time to complete development, and had more molts compared to the larvae from the same parents after they had aged one more or longer. The duration of adult life decreased when parental age increased.
=== Legal status === Avutometinib/defactinib was approved for medical use in the United States in May 2025. The FDA granted the application for avutometinib/defactinib priority review, breakthrough therapy, and orphan drug designations.
Sources: en.wikipedia.org
Vitamin K2, the main storage form in animals, has several subtypes, which differ in isoprenoid chain length. These vitamin K2 homologues are called menaquinones, and are characterized by the number of isoprenoid residues in their side chains. Menaquinones are abbreviated MK-n, where M stands for menaquinone, the K stands for vitamin K, and the n represents the number of isoprenoid side chain residues. For example, menaquinone-4 (abbreviated MK-4) has four isoprene residues in its side chain. Menaquinone-4 (also known as menatetrenone from its four isoprene residues) is the most common type of vitamin K2 in animal products since MK-4 is normally synthesized from vitamin K1 in certain animal tissues (arterial walls, pancreas, and testes) by replacement of the phytyl tail with an unsaturated geranylgeranyl tail containing four isoprene units, thus yielding menaquinone-4 which is water soluble in nature. This homolog of vitamin K2 may have enzyme functions distinct from those of vitamin K1. MK-7 and other long-chain menaquinones are different from MK-4 in that they are not produced by human tissue. MK-7 may be converted from phylloquinone (K1) in the colon by Escherichia coli bacteria. However, these menaquinones synthesized by bacteria in the gut appear to contribute minimally to overall vitamin K status. MK-4 and MK-7 are both found in the United States in dietary supplements for bone health.
Works by or about Franz Joseph I at the Internet Archive Works by Franz Joseph I at LibriVox (public domain audiobooks) Newspaper clippings about Franz Joseph I in the 20th Century Press Archives of the ZBW
The association with celiac disease is unclear, with a 2019 study finding no increase in dementia overall in those with celiac disease, while a 2018 review found an association with several types of dementia, including Alzheimer's disease. Some studies have reported a potential link between infection with certain viruses and developing Alzheimer's disease later in life, such as COVID-19 or Herpes simplex virus 1 (HSV-1). Some researchers have proposed that Alzheimer's disease is type 3 diabetes because of a number of correspondences with both type 1 and type 2 diabetes.
Burkholderia pseudomallei (also known as Pseudomonas pseudomallei) is a Gram-negative, bipolar, aerobic, motile rod-shaped bacterium. It is a soil-dwelling bacterium endemic in tropical and subtropical regions worldwide, particularly in Thailand and northern Australia. It was reported in 2008 that there had been an expansion of the affected regions due to significant natural disasters, and it could be found in Southern China, Hong Kong, and countries in the Americas. B. pseudomallei, amongst other pathogens, has been found in monkeys imported into the United States from Asia for laboratory use, posing a risk that the pathogen could be introduced into the country. Although it is mainly a soil-dwelling bacterium, one study showed that Burkholderia pseudomallei survived in distilled water for 16 years, demonstrating that it is capable of living in water if a specific environment is provided. It is resistant to a variety of harsh conditions including nutrient deficiency, extreme temperature or pH. It infects humans, causing the disease melioidosis; mortality is 20–50% even with treatment. The CDC classifies it as a "Tier 1 select agent" with potential as a bioterrorism agent. It infects other animals, most commonly livestock such as goats, pigs, and sheep, less frequently. It is also capable of infecting plants in a laboratory setting. Burkholderia pseudomallei measures 2–5 μm in length and 0.4–0.8 μm in diameter and is capable of self-propulsion using flagella.
== Life == Kleinman received a B.S. in chemistry from Simmons College in 1969 and a M.S. and Ph.D. from the Massachusetts Institute of Technology in 1973. She did postdoctoral training at Tufts University. Kleinman worked at National Institutes of Health (NIH) from 1975 to 2006 in the National Institute of Dental and Craniofacial Research (NIDCR) and served as Chief of the Cell Biology Section in NIDCR's Laboratory of Cell and Developmental Biology (1985–2006). Her laboratory was the first to report the wound-healing effects of thymosin beta 4 (TB4), a synthetic version of a naturally occurring molecule. Her research accomplishments also include defining various angiogenic and antiangiogenic molecules and identifying sites on laminin for adhesion, migration, neurite outgrowth, angiogenesis, metastases and inhibition of metastases, and the respective receptors. Kleinman is a co-inventor of Matrigel. In 1992, during his first week as deputy director for intramural research, Lance Liotta appointed Kleinman to chair the new intramural women scientists' task force to investigate impediments to the advancement of women at NIH. She has received numerous awards for her research and for her efforts on behalf of women scientists. She has obtained multiple patents, many of which have been commercialized and one of which is in pivotal clinical trials. In 2006, she left the NIH to join the George Washington University as an adjunct professor in the department of biochemistry and molecular biology. She has subsequently consulted for various pharmaceutical companies Kleinman is Jewish.
Sources: en.wikipedia.org
== Medical uses == Metandienone was formerly approved and marketed as a form of androgen replacement therapy for the treatment of hypogonadism in men, but has since been discontinued and withdrawn in most countries, including in the United States. It was given at a dosage of 5 to 10 mg/day in men and 2.5 mg/day in women.
=== Dosimetry === The radiation absorbed dose is the amount energy absorbed per unit weight of the target material. Dose is used because, when the same substance is given the same dose, similar changes are observed in the target material(Gy or J/kg). Dosimeters are used to measure dose, and are small components that, when exposed to ionizing radiation, change measurable physical attributes to a degree that can be correlated to the dose received. Measuring dose (dosimetry) involves exposing one or more dosimeters along with the target material. For purposes of legislation doses are divided into low (up to 1 kGy), medium (1 kGy to 10 kGy), and high-dose applications (above 10 kGy). High-dose applications are above those currently permitted in the US for commercial food items by the FDA and other regulators around the world, though these doses are approved for non commercial applications, such as sterilizing frozen meat for NASA astronauts (doses of 44 kGy) and food for hospital patients. The ratio of the maximum dose permitted at the outer edge (Dmax) to the minimum limit to achieve processing conditions (Dmin) determines the uniformity of dose distribution. This ratio determines how uniform the irradiation process is.
The English word Germany derives from the Latin Germania, which came into use after Julius Caesar adopted it for the peoples east of the Rhine. The German term Deutschland, originally diutisciu land ('the German lands'), is derived from deutsch (cf. Dutch), which descended from Old High German diutisc 'of the people' (from diot or diota 'people'), originally used to distinguish the language of the common people from Latin and its Romance descendants. This in turn descends from Proto-Germanic *þiudiskaz 'of the people' (see also the Latinised form Theodiscus), derived from *þeudō, descended from Proto-Indo-European *tewtéh₂- 'people', from which the word Teutons also originates.
== Medical uses == Flucloxacillin is an antibiotic used to treat lactational mastitis, skin infections, external ear infections, infections of leg ulcers, diabetic foot infections, and bone infections.
Sources: en.wikipedia.org
BPC-157 is a synthetic fifteen-amino-acid peptide whose sequence corresponds to a fragment of a protein found in human gastric juice. It is studied mainly in preclinical research and is not an approved pharmaceutical product in major markets. Materials sold for laboratory use are typically labelled as research chemicals.
No medicines regulator in the United States or the European Union has approved BPC-157 as a therapeutic product. Presenting it as a drug or as a dietary supplement ingredient would generally not match its regulatory status. Availability as a research chemical does not imply clinical approval.
Published reports rest largely on animal models and cell culture rather than controlled human trials. Review articles describe the proposed mechanisms as incompletely understood. Conclusions about effects in humans therefore remain tentative.
It is a synthetic peptide. Its design was inspired by a fragment of a protein found in human gastric juice, but the fifteen-amino-acid molecule itself is made in a laboratory and is not a normal component of food or of human tissue in appreciable amounts.